Question

Determine the time period when the length of the pendulum is 45 cm.

Answer 1

Given that length of pendulum is 45 cm

Let T be the time period then the formula to find T will be

$T=2\pi\sqrt[]{\frac{l}{g}}$

Here, g is the acceleration due to gravity which is equal to 9.8 m/s^2.

Substituting the values, we get

$\begin{gathered} T=2\times3.14\times\sqrt[]{\frac{45}{9.8}} \\ =13.45\text{ s} \end{gathered}$

Hence, the time period will be 13.45 seconds.